386941861 has 2 divisors, whose sum is σ = 386941862. Its totient is φ = 386941860.

The previous prime is 386941843. The next prime is 386941909. The reversal of 386941861 is 168149683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378497025 + 8444836 = 19455^2 + 2906^2 .

It is a cyclic number.

It is not a de Polignac number, because 386941861 - 2¹⁵ = 386909093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386941831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193470930 + 193470931.

It is an arithmetic number, because the mean of its divisors is an integer number (193470931).

Almost surely, 2^386941861 is an apocalyptic number.

It is an amenable number.

386941861 is a deficient number, since it is larger than the sum of its proper divisors (1).

386941861 is an equidigital number, since it uses as much as digits as its factorization.

386941861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 386941861 is about 19670.8378316736. The cubic root of 386941861 is about 728.6996686129.

The spelling of 386941861 in words is "three hundred eighty-six million, nine hundred forty-one thousand, eight hundred sixty-one".